Soil pH is a measure of the acidity or alkalinity of the soil, expressed on a scale from 0 to 14. A pH of 7 is neutral, while values below 7 indicate acidic soil and values above 7 indicate alkaline soil. Soil pH influences the availability of nutrients to plants and affects soil microbial activity. Most plants thrive in slightly acidic to neutral soils (pH 6-7), and adjustments to pH levels can be made using lime or sulfur, depending on the soil's needs.
